▎ 摘　　要

NOVELTY - Producing graphene oxide modified asphalt-based carbon fiber comprises (a) placing hydrogenated asphalt in autoclave, slowly heating, stirring to dissolve asphalt with quinoline solvent until amount of soluble asphalt reaches greater than or equal to 75%, and removing insoluble matter to obtain intermediate phase asphalt, (b) ultrasonically mixing graphene oxide solution with intermediate phase asphalt, stirring in high pressure reactor evacuated with nitrogen gas, adding modified additive under protection of nitrogen, and mixing to obtain modified asphalt, (c) charging modified asphalt in melt spinning kettle, heating, maintaining at constant temperature until modified asphalt melted, and spraying from spinning hole by drawing upper roll to prepare primary fiber, and (d) pre-oxidizing the primary fiber at 260-300 degrees C with heating rate of 1-2 degrees C/min under air atmosphere to obtain pre-oxidized wire, and carbonizing the pre-oxidized wire in three stages in presence of high purity. USE - The method is useful for producing graphene oxide modified asphalt-based carbon fiber. ADVANTAGE - The method has simple operation, low cost, and strong operability. DETAILED DESCRIPTION - Producing graphene oxide modified asphalt-based carbon fiber comprises (a) placing hydrogenated asphalt in autoclave, slowly heating at 420-450 degrees C under nitrogen flow rate of 1-2 l/min, stirring at speed of 350-400 revolution/minute for 60-90 minutes to dissolve the asphalt with quinoline solvent until amount of soluble asphalt reaches greater than or equal to 75%, and removing insoluble matter to obtain intermediate phase asphalt, (b) ultrasonically mixing graphene oxide solution with the intermediate phase asphalt for 0.5-2 hours, where the concentration of graphene oxide in the asphalt solution is 0.1-5 wt.%, stirring in high pressure reactor evacuated with nitrogen gas at 300-380 degrees C, adding modified additive under protection of nitrogen (mass ratio of oxidized asphalt to modified additive is 1:0.001-0.05), and mixing to obtain modified asphalt, (c) charging the modified asphalt in melt spinning kettle is a single hole spinneret having a pore diameter of 0.5-0.8 mm, heating at 300-350 degrees C, and maintaining at constant temperature until the modified asphalt melted, and spraying from the spinning hole by drawing upper roll at drafting rate of 400-800 m/min to prepare primary fiber, and (d) pre-oxidizing the primary fiber at 260-300 degrees C with heating rate of 1-2 degrees C/min under air atmosphere to obtain pre-oxidized wire, and carbonizing the pre-oxidized wire in three stages at 650-800 degrees C, 850-1000 degrees C and 1000-1200 degrees C with heating rate of 1-3 degrees C/min in presence of high purity nitrogen for 0.5-1 hour to obtain graphene oxide modified asphalt-based carbon fiber.